iwasaki, hiromi
Current rating: 1447
Record: 4-7
| Grand Prix Yokohama 2012 (modern) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 38 | Mishima, Takuro (1500) | Lost 1-2 | -171447 |
| 2modern | 438 | Kohki, Ogawa (1390) | Lost 0-2 | -191428 |
| 3modern | 602 | Aranami, Yuuki (1464) | Won 2-1 | +191447 |
| 4modern | 561 | Kamada, Yuuki (1452) | Won 2-1 | +181465 |
| 5modern | 510 | Takahashi, Kenta (1493) | Lost 0-2 | -181447 |
| average opponent: 1460record: 2-3 | new rating: 1447 | |||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 438 | Okauchi, Yuuta (1384) | Won 2-1 | +161516 |
| 2extended | 238 | Miyazaki, Rintarou (1584) | Lost 1-2 | -171499 |
| 3extended | 252 | Ogawa, Kazuki (1524) | Lost 1-2 | -171482 |
| 4extended | 381 | Katamine, Kentarou (1481) | Lost 0-2 | -181464 |
| 5extended | 417 | Hidaka, Ayumi (1510) | Won 2-0 | +181482 |
| 6extended | 334 | Hattori, Taiki (1482) | Lost 0-2 | -181464 |
| average opponent: 1494record: 2-4 | new rating: 1464 | |||